Answer:
75 years
Step-by-step explanation:
The heart of the person beats 3.1x10⁹ times. As the heartbeat is 79 beat / min. The minutes the person lives are:
3.1x10⁹ beat * (1min / 79beat) = 3.92x10⁷ min.
1 hour are 60 minutes:
3.92x10⁷ min * (1 hour / 60min) = 6.54x10⁵hours
24 hours are 1 day:
6.54x10⁵hours * (1 day / 24h) = 2.725x10⁴ days.
1 year are 365 days:
2.725x10⁴ days * (1 year / 365 days) = 74.6 years.
In whole years are 75 years